Problem with adding a slide switch on iPod Shuffle

Problem with adding a slide switch on mp3 mod

http://www.instructables.com/id/NES-Controller-MP3-Player/

I am doing a project on putting an iPod Shuffle inside an NES controller and is having a problem with wiring the power switch.
Here's a picture of the circuit board.
**broken link removed**
It's a three way switch.
**broken link removed**
The picture is missing a prong on the bottom.
[Off - In order - Shuffle] modes.
I have a slide switch and want to wire it to [Off - Shuffle].

Can someone draw me a diagram on how to connect?
I'm trying to control it so I can turn it on and off with the new switch.

Thank you.